Pressure-volume-temperature equations of state of Au and Pt up to 300 GPa and 3000 K: internally consistent pressure scales

摘要

By using a Mie-Grüneisen-type analysis method, the pressure-volume-temperature equations of state (P-V-T EOSs) of Au and Pt have been determined up to 300 GPa and 3000 K based on the experimental shock Hugoniot and thermodynamic data. The calculated results of Au and Pt show an excellent agreement with available experimental volume compression data over a wide range of pressures and temperatures. A comparison of our results with previous theoretical investigations has also been done. In addition, we have further examined the consistency of our results and the P-V-T EOS of MgO [K. Jin, X.Z. Li, Q. Wu, H.Y. Geng, L.C. Cai, X.M. Zhou, and F.Q. Jing, The pressure-volume-temperature equation of state of MgO derived from shock Hugoniot data and its application as a pressure scale, J. Appl. Phys. 107 (2010), pp. 113518] using simultaneous volume measurements of Au, Pt, and MgO at various temperatures. The good agreement among the P-V-T EOSs of Au, Pt, and MgO implies that these EOSs can be used as the reliable pressure scales in high pressure-temperature diamond anvil cell experiments.View full textDownload full textKeywordsshock Hugoniot, equation of state, Au, Pt, pressure scale PACS 64.30.Ef, 52.35.Tc, 62.50.-pRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/08957959.2011.611469